Troubleshooting Your System 1176 If the fan does not function, turn off the system and install a new fan.See "Installing the Cooling Fan Assembly" on page 96.7 Restart the system.If the problem is resolved, close the system. See "Closing the System" onpage 59.If the replacement fan does not operate, see "Getting Help" on page 133 .Troubleshooting System MemoryCAUTION: Many repairs may only be done by a certified service technician.You should only perform troubleshooting and simple repairs as authorized inyour product documentation, or as directed by the online or telephone serviceand support team. Damage due to servicing that is not authorized by Dell is notcovered by your warranty. Read and follow the safety instructions that camewith the product.NOTE: Invalid memory configurations can cause your system to halt at startupwithout video output. See "General Memory Module Installation Guidelines" onpage 68 and verify that your memory configuration complies with allapplicable guidelines.1 If the system is not operational, turn off the system and attachedperipherals, and unplug the system from the power source. Wait at least10 seconds and then reconnect the system to power.2 Turn on the system and attached peripherals and note the messageson the screen.Go to step 13 if an error message appears indicating a fault with aspecific memory module.3 Enter the System Setup program and check the system memory setting.See "Memory Configuration" on page 42. Make any changes to thememory settings, if needed.If the memory settings match the installed memory but a problem is stillindicated, go to step 13.4 Turn off the system and attached peripherals, and disconnect the systemfrom the electrical outlet.5 Open the system. See "Opening the System" on page 58.
